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The valueOf() method returns the primitive value of a Boolean object.
Syntax
bool.valueOf()Return value
The primitive value of the given Boolean object
Description
The valueOf method of Boolean returns the primitive value of a Boolean object or literal Boolean as a Boolean data type.
This method is usually called internally by JavaScript and not explicitly in code.
Examples
Using valueOf
x = new Boolean(); myVar = x.valueOf(); // assigns false to myVar
Specifications
| Specification | Status | Comment |
|---|---|---|
| ECMAScript 1st Edition (ECMA-262) | Standard | Initial definition. Implemented in JavaScript 1.1. |
| ECMAScript 5.1 (ECMA-262) The definition of 'Boolean.prototype.valueOf' in that specification. |
Standard | |
| ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Boolean.prototype.valueOf' in that specification. |
Standard | |
| ECMAScript 2017 Draft (ECMA-262) The definition of 'Boolean.prototype.valueOf' in that specification. |
Draft |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |